کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6028763 | 1188705 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Atlas-based head modeling and spatial normalization for high-density diffuse optical tomography: In vivo validation against fMRI
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کلمات کلیدی
DOIOxyhemoglobinHbRFOVdeoxyhemoglobinHbO2Anatomical atlas - اتات آناتومیکGroup analysis - تجزیه و تحلیل گروهDiffuse optical imaging - تصویربرداری نوری متفرقهfunctional magnetic resonance imaging - تصویرسازی تشدید مغناطیسی کارکردیDiffuse optical tomography - توموگرافی نوری توزیع شدهNon-linear registration - ثبت نام غیر خطیHBT - دگرباشان جنسیField of view - میدان دیدSpatial normalization - نرمال سازی فضاییBrain mapping - نگاشت مغزی، نقشه برداری مغزیtotal hemoglobin - هموگلوبین کل
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب شناختی
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چکیده انگلیسی
Diffuse optical imaging (DOI) is increasingly becoming a valuable neuroimaging tool when fMRI is precluded. Recent developments in high-density diffuse optical tomography (HD-DOT) overcome previous limitations of sparse DOI systems, providing improved image quality and brain specificity. These improvements in instrumentation prompt the need for advancements in both i) realistic forward light modeling for accurate HD-DOT image reconstruction, and ii) spatial normalization for voxel-wise comparisons across subjects. Individualized forward light models derived from subject-specific anatomical images provide the optimal inverse solutions, but such modeling may not be feasible in all situations. In the absence of subject-specific anatomical images, atlas-based head models registered to the subject's head using cranial fiducials provide an alternative solution. In addition, a standard atlas is attractive because it defines a common coordinate space in which to compare results across subjects. The question therefore arises as to whether atlas-based forward light modeling ensures adequate HD-DOT image quality at the individual and group level. Herein, we demonstrate the feasibility of using atlas-based forward light modeling and spatial normalization methods. Both techniques are validated using subject-matched HD-DOT and fMRI data sets for visual evoked responses measured in five healthy adult subjects. HD-DOT reconstructions obtained with the registered atlas anatomy (i.e. atlas DOT) had an average localization error of 2.7Â mm relative to reconstructions obtained with the subject-specific anatomical images (i.e. subject-MRI DOT), and 6.6Â mm relative to fMRI data. At the group level, the localization error of atlas DOT reconstruction was 4.2Â mm relative to subject-MRI DOT reconstruction, and 6.1Â mm relative to fMRI. These results show that atlas-based image reconstruction provides a viable approach to individual head modeling for HD-DOT when anatomical imaging is not available.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 85, Part 1, 15 January 2014, Pages 117-126
Journal: NeuroImage - Volume 85, Part 1, 15 January 2014, Pages 117-126
نویسندگان
Silvina L. Ferradal, Adam T. Eggebrecht, Mahlega Hassanpour, Abraham Z. Snyder, Joseph P. Culver,